Group 1 - The core viewpoint of the articles is that U.S. homebuilders are using strategies like "buydown" to lower mortgage rates for new homebuyers, which inadvertently keeps home prices high [1][2] - Morgan Stanley reports that without these "buydown" strategies, home prices could decrease by approximately 12% for homes associated with Ginnie Mae and about 5% for those linked to Fannie Mae and Freddie Mac [1] - Builders often provide higher down payment incentives on government-backed loans, which are typically accessed by lower-income and lower-credit-score borrowers [1] Group 2 - The "3-2-1" buydown structure is a common method where the mortgage interest rate is reduced by three percentage points in the first year, two in the second, and one in the third [1] - Morgan Stanley notes that a "permanent buydown" option exists, which has a more significant impact on mortgage bond investors, being more common in Ginnie Mae loans than in those from Fannie Mae and Freddie Mac [2] - Approximately 30% of new home sales backed by Fannie Mae and Freddie Mac involve builders offering "buydown" services, while this figure rises to 75% for new home sales linked to Ginnie Mae [2]